[PSUBS-MAILIST] Seehund Aft Dive Tank

[Joe Perkel via Personal_Submersibles]

Carsten,
 
Thank you that is particularly helpful, the "J" trap 
 
I think Vance's earlier suggestion of ending with a simple head and then shaping the aft end holds up as the best way to proceed. I'll make the cone a soft tank, material and attachment choices now on the table.
 
Thanks!
 
Joe
On Wednesday, May 7, 2014 5:35 PM, "Carsten Standfuß " via Personal_Submersibles" <personal_submersibles at psubs.org> wrote:
  
E-Mail Software 6.0

Hi Joe the Seehund has some quite 
funny system. 

01) 
No 
there is no double hull in the aft. 

02) Yes both dive tanks has the
vents on the 
aft and highest point for quick diving. From command "dive" to get
underwater 
was 10 seconds. 

03) The j trap is the outlet
of the 
blow air line. 

The
Seehund 
surface the following way: 

Close vent vale, blow a little compress air to the blow out line, until the diesel snorckel surface.
Drive the 
diesel with the main e-motor as compressor and blow the dive tank with
this  gas 
complete. out. 

Another way was : (mostly use by the 
crew but more or less ilegal : Run the boat dynamicly to the surface ,
start the 
diesel and blow the tanks with the exhaust gas. 

Both ways were
developt 
to safe on compress storage gases. 

04) No idea. 

vbr 
Carsten

rkel via Personal_Submersibles"
<personal_submersibles at psubs.org> schrieb: 
As an example of my delving into this particular subject, I am
having a bit of trouble trying to understand the nature of the aft
diving tank (No.1) on the original Seehund. Understanding this
well, is key to an appropriate attempt for a viable
facsimile.
>
>
>I've attached an image of where I'm
unclear. I suspect that the uppermost volume of this tank
was encased in what looks like a double hull void, but I can not quite
confirm this. Also in question are the following with my analysis,
supposition or questioning.
>
>
>
>
>1)
Is this a double hull in this aft conical section?   (Raising
CB, lowering CG)
>2) Position of the vent
valve?    (Is this due to dive angle?)
>3) "J" trap nature of bottom of assembly in keel section of
tank?    (Anti-syphon?)
>4) Coiled hose assembly
in section view?? (completely at a loss
here?)
>
>
>Comment's and suggestions are sincerely
appreciated. What's on my mind is the temptation and viability of
reproduction in reduced scale. Sea Hunter's lines are pleasing and close
to scale in section @ 36"OD for the hull, 24" for the CT/Sail assembly
and No. 14 pipe for the torpedo/battery pod assemblies. (Can get away
with No. 12 as well).
>
>
>Cliff's wonderful .xls
requires that I draw up an accurate model first in order to simulate
ballasting.
>
>
>Joe
>
>   

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